04310419 is referenced by 86 patents and cites 6 patents.

A filter element for straining liquid formed of a filter material in a convoluted form including two portions, one portion being a planar portion and the other portion being a corrugated portion having a plurality of elevated areas. The filter material is foled in half in the longitudinal center and wound in convolutions so that a series of letters V are formed on a transverse cross-sectional surface thereof. The pitch of the elevated areas is smaller in the central portion of the convoluted filter element corresponding to the end of the filter material at which winding is started and larger in the outer peripheral portion thereof.

Title
Filter element for liquid straining filter
Application Number
6/229629
Publication Number
4310419
Application Date
January 29, 1981
Publication Date
January 12, 1982
Inventor
Hideaki Sasaya
Okazaki
JP
Akio Nara
Okazaki
JP
Agent
Cushman Darby & Cushman
Assignee
Nippon Soken
JP
IPC
B01D 29/06
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